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Spherical trig application

  • Subject: [mg2209] Spherical trig application
  • From: ui at (Roger Uribe)
  • Date: Mon, 16 Oct 1995 15:53:36 GMT
  • Approved:
  • Distribution: local
  • Newsgroups: wri.mathgroup
  • Organization: Wolfram Research, Inc.
  • Sender: daemon at ( )

Given a roughly convex polygon on the Earth's surface - typically 1000
miles "diameter" and 3 - 12 vertices. I need to know whether a given
point is in it or not.  There are about 10,000+ such points to test so
I need an effecient method.

Any ideas, or know of any software that will do something like it.

I guess defining the enclosing circle and discarding any points
outside that would get rid of most of them.

I don't want a lesson in spherical trig, I'm no expert but I know
enough, it's the methods and short cuts I'm after.

Thanks  Roger.

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